Is this it? YouTube - Craig Smith 500lb Front Squat
found this one too:
YouTube - Hossein Rezazadeh 280kg/617lb Front Squat What a fricken beast! I used to watch this guy in the Olymipic games when he competed.
The 2nd vid is the ONE Rezza uses a clean grip, the guy in the first vid uses straps, not something oly lifters would do the. The whole idea of oly front squat it's to setup a perfect base for the other oly moves.